VDB-151941 · CVE-2019-14855 · USN-4516-1

GnuPG up to 2.2.17 SHA1 Certificate risky encryption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in GnuPG up to 2.2.17. This impacts an unknown function of the component SHA1 Handler. Performing a manipulation as part of Certificate results in risky encryption. This vulnerability is identified as CVE-2019-14855. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in GnuPG up to 2.2.17. This affects some unknown processing of the component SHA1 Handler. The manipulation as part of a Certificate leads to a risky encryption vulnerability. CWE is classifying the issue as CWE-327. The product uses a broken or risky cryptographic algorithm or protocol. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A flaw was found in the way certificate signatures could be forged using collisions found in the SHA-1 algorithm. An attacker could use this weakness to create forged certificate signatures. This issue affects GnuPG versions before 2.2.18.

The weakness was released 03/20/2020 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2019-14855 since 08/10/2019. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1600 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 232212 (Linux Distros Unpatched Vulnerability : CVE-2019-14855), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.2.18 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (232212). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

GnuPG

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CNA Base Score: 5.3
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Risky encryption
CWE: CWE-327 / CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 232212
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2019-14855

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: GnuPG 2.2.18

Timelineinfo

08/10/2019 🔍
03/20/2020 +223 days 🔍
03/21/2020 +1 days 🔍
05/11/2025 +1877 days 🔍

Sourcesinfo

Advisory: USN-4516-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2019-14855 (🔍)
GCVE (CVE): GCVE-0-2019-14855
GCVE (VulDB): GCVE-100-151941

Entryinfo

Created: 03/21/2020 08:45
Updated: 05/11/2025 02:30
Changes: 03/21/2020 08:45 (41), 03/21/2020 08:50 (11), 10/04/2020 04:26 (1), 04/18/2024 13:20 (17), 04/18/2024 13:25 (19), 03/07/2025 05:49 (5), 05/11/2025 02:30 (3)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.